Covering for fire-door openings



(No Model.

W. H. HOAG.

COVERING FOR FIRE DOOR OPENINGS.

No. 484,636. Patented Oct. 18, 1892.

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UNITED STATES PATENT OEEicE.

IVILLIAM H. HOAG, OF AMSTERDAM, NEW YORK.

COVERING FOR FIRE-DOOR OPENINGS.

SPECIFICATION forming part of Letters Patent No. 484,636, dated October 18, 1892.

Application filed April 18, 1892.

To all whom it may concern:

Be it known that LWILLIAM H. HOAG, a citizen of the United States, residing at the city of Amsterdam, county of Montgomery, State of New York, have invented a new and useful Improvement in Covering for Fire-Door Openings, of which the following is a specification.

My invention relates to improvements in the construction of the top of the fire-door opening in a steam-boiler furnace and in the rear of the boiler over the flues; and the obj ect of my invention is to provide a means for holding a refractory substance in position over the fire-door opening and which may be adjusted and parts thereof removed when desired. I accomplish this object by means of the mechanism illustrated in the accompanying drawings, in which Figure 1 is a front elevation of a furnace provided with my invention. Fig. 2 is a longitudinal section through a steam-boiler furnace. Fig. 3'is a plan of the frame. Fig. 4. is a section along the lines 1 1 on Fig. 3. Fig. 5 is a section along the lines 2 2 on Fig. 3. Fig. 6 is a plan along the lines 3 3 on Fig. 4. Fig. 7 is a plan through the air-chamber, and Fig. 8 is an end view of the plate placed in the form of an arch.

Similar letters refer to similar parts throughout the several views.

I construct a frame A, which is composed of a series of cross-shaped metallic plates A, secured together by bolts B B, passing through ties b 1), extending across the adjoining ends of each of the arms of said cross-shaped plates and also through the ends of the plates. The ends of the adjoining cross-shaped plates A are secured by means of bolts 0 O, passing through the sides thereof and through corresponding ties 0. Thus I arrange a number of plates A A together in such a manner as to leave openings A A at frequent intervals and place a sufficient number of the plates together to form a covering for the fire-door opening in a steam-boiler furnace.

In contact with the masonry above the firedoor opening I place themetallic plate E, which is supported by the standards 6 6, resting upon the frame A. Extending across the frame A, I place a series of bars F, resting upon the frame, to which I secure by hooks f,

Serial No. 429,547. (No model.)

passing through the openings A A into the frame, the anchor -frame H. The anchorframe H is thus suspended below the frame A throughout its whole extent, and at its end toward the interior of the furnace it projects upwardly to a point slightly above the frame A, as shown in Figs. 2 and 4. The anchorframe H is provided with slots h, within which the anchors G are adjustably secured. The lower edge of the slots 71. are provided with notches h. At the end of each of the slots h, nearest the center of the anchor-frame H, is formed a square opening 71 In the slots h I place the anchor G. The anchor G is provided with a shank upon which are placed two lugs g, slightly separated from each other, the shank 9 between the two lugs g passing into the slot h at the squared opening W, the opening 77. being large enough to admit of the passage of the lug g. The anchor G is then moved through the slot it until it reaches the notch h, in which it is desired to locate the anchor. Then the anchor is turned, bringing the narrower side of the shank into the notch h, where it fitssnugly and is held securely in position, one

of the lugs g being on one side of the anchor frame, the other of the lugs g on the opposite: side of the anchor-frame, the shank g -.be'-- tween the two lugs fitting securely within the notch h of the sloth. The arms of the anchor are usually constructed in the form shown in Fig. 5, being arranged in the form of an open square, the side opposite the shank being broken, leaving a space between the adjoining ends. Extending from one arm to the other of the anchor I place the narrow ties g As a covering for the ends of the anchorframe H, I place the finishing-plate J, extending across from one side of the fire-door opening to the other. The anchors G are placed alternately one on each side of the frames H, as shown in Fig. 6, except on one side of the sections, where the anchors are made double, one on each side of the frame, and a sufficient number of the frames are placed in position over the fire-door opening, as may be desired.

For the purpose of securing the anchorframes together I place the bolts K K, extending through the series of frames from one end to the. other, by means of which the frames.

may be drawn toward each other. Along the edge of the air-chamberM, which is the space between the plate E and the frameAand which separates the interior of the furnace from said air-chamber, I place the plate L, which is provided with an opening about midway between its ends,communicatin'gwith, a channel on through the cement at the end of the-anchor-frame H, which in turn communicates upon each sideof thetinterior'of" the furnace.

In order that the air may be caused to circulate through-the chamber M; a space m is constructed in the fire-wallsomeach side of the fire-door opening which communicates, beneath the dead-plate in the f urnaceat one end and with the air-chamber M1 between the plate E and the,frame A at the-,other, end, andfa draft willbemaintaiu'ed front below the dead-plate, up th rough'the air chamber, out through the openingfin' the.

plate L and channel m2 offthe interidryoflthe, furnace. substance, it is understood, is placed in GOtl-i tact with the frame Aand the anchors G and.

occupies the position shown by, dotted lines in Fig. 4, and after it is hardened; into a; homogeneous body it is retained in position.

by means of the anchors which areembedded within the substance.vv Whemthe fire-door opening is in the form of an arch, Fig. 8 shows the positionof the end .of. the. cement-carry,- ing frame. I do not limitmyself, however,

to the exact arrangement of the" opening, communicating withthe air-chamber, since,

instead of communicating withthe spaceibeg low the deadplate, it may open through the side walls of the furnace'on in any suitable. place.

Thecemeut or other refractory heat-resistingsubstance is pjuton a single section ofmy anchors or. cement carriers, subjected: to, a; veryjpowerful heat, caused to solidify, and,

forming .a fire-brick, and then the section con,

taining the cement 1 or jother refractory sub-j stance thus solidified? is suspended {from the frame by meansofthe hooks aneaayna, scribed-after the frame .isplaced impositionabout.the fire-dooropening. Whena section;

or portion thereof becomes broken 1or.,burnedl} out, it may be removed and anefiftsectio'n iia'ving the cement hardened guponitjmaybe sub stituted therefor without removinggthegmain plate. Thus isavoided the necessity offplac; 1 ingya mass of: green cement in contactwithg The cement or other refractory may be fillediwith green; cement, or by placingthe anchors on each side of: the anchorframe, as shown in the extreme right of Fig. 5, or when the modified form is used by having one overlap the other.

j For thepurpose of removing a section it is necessary to be able to reach the upper surface of the frame A within the air-chamber ,M. I -In order. to remove the hooks f from the plate F, I arrange the plate L, extending across the rear of the air-chamber M, which is cementeddnl position and which may be removed by cuttingaway the coating of cement along the outer side, which will give a free access to the chamber and permita removal openingjs. in'a' horizontal plane or in the form.

o fian farch, withoutmakingaseparate frame for each individualfurnace where these'difi ferences occur, sinceby means of a tenon in the crossap'lates A' these plates maybe drawn, closer ior'removed fartherrfro meach other, or;

it maybe removed, asgdesired, thus providing lfonthe diiferingsizes and contours of the'cov- ;ering,ih a' fire-door opening,

W hat Lclaim as my, invention, anddesire jto secure by Letters'latent, is'- 1. A frame for. supportingfcement holding ranchors, composed ,offa series; of'plates'adj ustfably secured together, ,provided" with aperttures between said plates; 2. series. of barswex- ,tending across said plates from one end to the other thereof, and a {seriesgof ,anchori-holding ifi-ames suspended .from said barsiby means of suitable hooks,substantia llyas described, and for the purpose set forth.

2. In an apparatus for retaining .fire-resistling substance above the! fire-door opening of Eajturnace, consistingof a plate in contactwwith- Fthe top of-said opening,a framebeneathfsaid .Zplate and separated therefrom, an air-,cham- Lber between said frame and said; plate said iair-chamber communicating with theinterior 1of said"furnac e, communication betweenj'said air-chamber vin theoutside of] said; furnace,

with a sericsof fadjustable,sectionssuspended ifromthlelowerlone ofqsaid frames icarryingza heat resistingisubstance, substantiallyas described,-and for.the purposetset'forth.

openingpof avfurnace,ianair-cha1nber commu- {nicatingwith the outsidei'of the furnacemi'qvided with a plate between, theinterior oflthe furnace and said"; chambercapablej of; being. removed from thQiIJIQIiOIYiOf thieLfurnace, the bottom of saidair-jchamber having. a frame. supporting adj nstablesections of cement carriers, substantially as described, and '{fdrlthe purpose Setlxforth, v

4. Anapparatus for covering; the fire-door openm'goffa furnace, consistingiof an anchorholding'frame providedpwith alongitudinal slot through its side, saidislot'having near the,

centerof said anchor-holding frame a squared 3. Inan apparatus for covering. the fire-door opening, said frame suspended by means of suitable hooks from a frame placed across said fire-door opening, and an anchor provided with a shank uponwhichtwolugs are placed slightly separated from each other, the shank between the said lugs fitting snugly within said longitudinal slot, one of these lugs being upon either side of said anchor-holding frame, said anchor provided with outwardly-projecting arms separated from each other, said anchors embedded in the fire-resisting substance, substantially as described, and for the purpose set forth.

5. An apparatus for covering the fire-door opening of a furnace, composed of a series of 

